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Finding the Fourth Proportional to 420,980.69, 631,627.88 and 252,621.79

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Solution

The fourth proportional to 420,980.69, 631,627.88 and 252,621.79 is: 379,026.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,980.69 : 631,627.88 = 252,621.79 : x
  2. Step 2: Convert to fraction form
    420,980.69/631,627.88 = 252,621.79/x
  3. Step 3: Cross multiply
    420,980.69x = 631,627.88 × 252,621.79
  4. Step 4: Simplify right side
    420,980.69x = 159,562,962,817.33
  5. Step 5: Solve for x
    x = 159,562,962,817.33/420,980.69
  6. Step 6: Final answer
    x = 379,026.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.